Mischa Zverev
Dustin Brown
Philipp Kohlschreiber
Casper Ruud
Jan-Lennard Struff
Daniel Masur
Martin Klizan
Nicolas Kicker
Thomaz Bellucci
Mikhail Kukushkin
Horacio Zeballos
Andreas Seppi
Jeremy Chardy
Jozef Kovalik
Hyeon Chung
Maximilian Marterer
Marius Copil
Thiago Monteiro
Tommy Haas
Sergiy Stakhovsky
Yannick Hanfmann
Gerald Melzer
Guido Pella
Cedrik-Marcel Stebe